Add arch64 tests for libeconf

testaarch64.fmf

@@ -0,0 +1,21 @@
+/plan:
+    summary: Basic test suite
+    discover:
+        how: fmf
+    execute:
+        how: tmt
+    adjust:
+        - when: arch != aarch64
+          enabled: false
+          because: components exist only on aarch64
+/test:
+    summary: Run all tests
+    test: |
+        git clone https://github.com/sssd-test/libeconf.git libeconf64
+        cd libeconf64/bindings/python3
+        cp econf.py test/econf.py
+        pytest -v test/
+    require:
+      - git-core
+      - pytest
+    duration: 30m